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Unveiling Nb-Ta mineralization processes:Insight from quartz textural and chemical characteristics in the Songshugang deposit,Jiangxi Province,South China

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Acta Geochimica 2024年第4期43卷 737-753页

作者： Hengsong Zhang Shaohao Zou Xilian Chen Deru Xu Zhilin Wang Yongwen Zhang Hua Wang state key laboratory of Nuclear resources and Environment East China University of TechnologyNanchang 330013JiangxiChina School of Earth Sciences East China University of TechnologyNanchang 330013JiangxiChina key laboratory of metallogenic Prediction of nonferrous metals and Geological Environment Monitoring Ministry of EducationSchool of Geosciences and Info-PhysicsCentral South UniversityChangsha 410083China Jiangxi Mineral resources Guarantee and Service Center Nanchang 330025JiangxiChina

The Songshugang deposit is a large Ta-Nb deposit in South China,with Ta-Nb mineralization associated genetically with the granite and pegmatite.A diversity of quartz from topaz-albite granite,quartz-mica pegmatite,quartz-feldspar pegmatite,and quartz-fluorite pegmatite at Songshugang was studied by CL and LA-ICP-MS in order to constrain enrichment mechanisms of Nb and Ta and to find geochemical indicators of quartz for rare metal *** image illuminates a canvas of complexity,the quartz from topaz-albite granite,quartz-mica pegmatite,quartz-feldspar pegmatite,and quartz-fluorite pegmatite,exhibits numerous dark CL streaks,patches,and a series of healed *** textures suggest that the rocks were fractured because of deep crustal pressure,and underwent later hydrothermal metasomatism and quartz *** quartz from quartz-fluorite pegmatite present limited patches or fractures but distinct growth bands,indicating that the melt fluid composition during the formation of quartz at this stage varies greatly and is less aff ected by mechanical *** LA-ICP-MS analysis of quartz shows that there is a positive correlation between Al and Li in the quartz from topaz-albite granite,quartz-mica pegmatite,quartz-feldspar pegmatite,to quartz-fluorite pegmatite,indicating that Al mainly enters the quartz lattice through charge compensation substitution mechanism with ***,our data deviate from the theoretical Li:Al mass ratio of~1:3.89 in quartz,indicating that there may be competition between H^(+)and Li in a water-rich magmatic *** quartz from topaz-albite granite is enriched in K and Na elements,and the quartz from quartz-fluorite pegmatite is enriched in fluorite with a low Ca content in quartz,further elucidating that these rocks were subjected to hydrothermal *** topaz-albitite granite to quartz-fluorite pegmatite,Al,Li and Ge content and Al/Ti,Ge/Ti,Sb/Ti ratios in quartz gradually increased,but

关键词： Nb-Ta deposit Quartz Cathodoluminescence LA-ICP-MS Trace elements Magma-hydrothermal evolution

Multidimensional regulation of Ti-Zr-Cr-Mn hydrogen storage alloys via Y partial substitution

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Nano Research 2024年第5期17卷 4211-4220页

作者： Haixiang Xiu Wanqiang Liu Dongming Yin Nan Ding Wenfeng Qiao Shaolei Zhao Long Liang Cong Liu Shaohua Wang Qingshuang Wang Bingbing Chen Limin Wang Yong Cheng School of Materials Science and Engineering Changchun University of Science and TechnologyChangchun 130022China state key laboratory of Rare Earth resources Utilization Changchun Institute of Applied ChemistryChinese Academy of Sciences(CAS)Changchun 130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026China Department of Energy Science and Engineering Nanjing Tech UniversityNanjing 211816China National Engineering Research Center of nonferrous metals Materials and Products for New Energy GRINM Group Co.Ltd.Beijing 100088China GRIMAT Engineering Institute Co. Ltd.Beijing 101407China College of Life Science and technology Changchun University of Science and TechnologyChangchun 130022China

High density and safe storage of hydrogen are the preconditions for the large-scale application of hydrogen ***,the hydrogen storage properties of Ti_(0.6)Zr_(0.4)Cr_(0.6)Mn_(1.4) alloys are systematically studied by introducing Y element instead of Ti element through vacuum arc *** the partial substitution of Y,a second phase of rare earth oxide is added in addition to the main suction hydrogen phase,C14 Laves *** to the unique properties of rare earth elements,the partial substitution of Y can not only improve the activation properties and plateau pressure of the alloys,but also increase the effective hydrogen storage capacity of the *** comprehensive properties of hydrogen storage alloys are improved by multidimensional regulation of rare earth *** them,Ti_(0.552)Y_(0.048)Zr_(0.4)Cr_(0.6)Mn_(1.4) has the best comprehensive *** alloy can absorb hydrogen without activation at room temperature and 5 MPa,with a maximum hydrogen storage capacity of 1.98 wt.%.At the same time,it reduces the stability of the hydride and the enthalpy change value,making it easier to release *** theoretical analysis and first-principle simulation,the results show that the substitution of Y element reduces the migration energy barrier of hydrogen and the structural stability of the system,which is conducive to hydrogen *** alloy has superior durability compared to the original alloy,and the capacity retention rate was 96.79%after 100 hydrogen absorption/desorption cycles.

关键词： AB_(2)-type hydrogen storage alloy rare earth element first-principles simulation multidimensional regulation

Ternary PtSmCo NPs electrocatalysts with enhanced oxygen reduction reaction

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Journal of Rare Earths 2020年第12期38卷 1305-1311页

作者： Qinghua Gong Leping Wang Ni Yang Lin Tian Gang Xie Bing Li School of Mechanical and Power Engineering East China University of Science and Technology.Shanghai 200237China Kunming metallurgical Research Institute Kunming 650031China state key laboratory of pressure hydrometallurgical technology of associated nonferrous metal resources Kunming 650031China

PtSmCo ternary metal nanoparticles(NPs)were synthesized as electrocatalysts for oxygen reduction reaction(ORR).Firstly,SmCo NPs were prepared by potentiostatic electrodeposition in ionic liquids(ILs),and the average particle diameter of SmCo NPs corresponds to about 238 nm(-0.65 V),72 nm(-0.75 V)and 45 nm(-0.85 V),***,displacement and reductions of SmCo NPs occur in the K2 PtCl4 and L-ascorbic acid sodium with about 3 nm of Pt NPs which grow on the surface of SmCo NPs to form PtSmCo ternary metal *** of cycle voltammetry(CV)and line sweep voltammetry(LSV)indicate that the electrocatalytic property for ORR generates a decreasing order of commercial Pt/C>PtSmCo0.85>PtSmCo0.75>*** durability testing(ADT)after 10000 cycles shows that PtSmCo0.85 NPs electrocatalyst decreases by-40%in electrochemical active surface areas(ECSA),the half-wave potential(E1/2)only negatively shifts by 14 mV and decreases by^13.6%in mass activity(MA).When compared with JM Pt/C,where it decreases by^49%in ECSA,E1/2 is negatively shifted by 40 mV and decreased by^50%in ***,PtSmCo0.85 NPs electrocatalyst is more stable than JM Pt/C.

关键词： Rare earth metal Electrodeposition Ionic liquid Electrocatalyst Stability

Corrosion protection of magnesium alloys anode by cerium-based anodization coating in magnesium-ait battery

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稀土学报：英文版 2023年第3期41卷 471-476,I0006页

作者： Xiang You Xiaowei Zhang Chuang Yu Yuanliang Chen Huiming Li Yanqing Hou Lin Tian Ni Yang Gang Xie state key laboratory of Complex nonferrous metal resources Clean Utilization Kunming University of Science and TechnologyKunming 650093China National Engineering Research Center for Rare Earth Materials GRINM Group Co.Ltd.Beijing 100088China GRIREM Advanced Materials Co. Ltd.Beijing 100088China state key laboratory of pressure hydrometallurgical technology of associated nonferrous metal resources Kunming 650031China

CeN_(3)O_(9)·6H_(2)O(0.5,1.0,1.5,and 2.0 g/L)was added into an 8.0%NaCl electrolyte solution to investigate this electrolyte for use in a Mg-air *** effects of the amount of CeN_(3)O_(9)-6H_(2)O on the corrosion resistance of an AZ31 Mg alloy anode and battery performance were investigated using microstructure,electrochemical(dynamic potential polarization method and electrochemical impedance spectroscopy),and battery *** re sults show that the addition of CeN_(3)O_(9)·6H_(2)O to the electrolyte leads to the formation of a Ce(OH)_(3)protective film on the surface of the AZ31 Mg alloy that improves the corrosion resistance of the Mg *** increase in the concentration of CeN_(3)O_(9)·6H_(2)O results in a denser Ce(OH)_(3)protective film and decreases corrosion rate of the AZ31 Mg *** the concentration of CeN_(3)O_(9)·6H_(2)O is 1.0 g/L,the corrosion rate of the Mg alloy is the lowest with a corrosion inhibition rate of70.4%.However,the corrosion rate increases due to the dissolution of the Ce(OH)_(3)protective film when the concentration of CeN_(3)O_(9)-6H_(2)O is greater than 1.0 g/*** the Mg alloy in the electrolyte solution containing CeN_(3)O_(9)-6H_(2)O for 50 h leads to the formation of the Ce(HO)_(3)protective film on its surface,which was confirmed by scanning electron microscopy of the AZ31 *** Mg^(2+)charge transfer resistance increases by 69.5Ωfrom the equivalent circuit diagram,which improves the corrosion resistance of the Mg *** discharge performance of CeN_(3)O_(9)·6H_(2)O improves according to a discharge test,and the discharge time increases by 40 min.

关键词： Az31 magnesium alloy anode CeN_(3)O_(9)·6H_(2)O addition Magnesium-air battery Corrosion rate Electrochemical Rare earths

A CFD model for gas uniform distribution in turbulent flow for the production of titanium pigment in chloride process

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Chinese Journal of Chemical Engineering 2016年第6期24卷 749-756页

作者： Yadong Li Gang Xie Ting Lei Chongjun Bao Lin Tian Yanqing Hou state key laboratory of Complex nonferrous metal resources Clean Utilization Kunming University of Science and Technology Kunming 650093 China Faculty of metallurgical and Energy Engineering Kunming University of Science and Technology Kunming 650093 China Kunming metallurgical Research Institute Kunming 650031 China key laboratory of pressure Hydrometallurgy technology associated Non-Ferrous metal resources Kunming 650031 China Kunming metallurgy College Kunrning 650-033 China

The fluid dynamic behavior of feeding gas （TiCI4） in an annular channel affects the combination of 02 and TiCI4 in an oxidation reactor, a key piece of equipment in titanium pigment production. The numerical procedure was validated by a 3-dimensional gas flow in the annular channel. Applying the validated model, the flow character- istics of TiCl4 in the oxidation reactor with a tangential inlet were simulated and characterized. The flow distribu- tion with five rectifying rings of different structure was simulated and analyzed. The results showed that the rectifying ring improved the distribution uniformity of the pressure and outlet velocity. Compared to the original case without a rectifying ring, the non-uniformity of the pressure and outlet velocity could be reduced by up to 91% and 69% respectively. The rectifying ring #5, which can be installed and adjusted easily, is more effective in realizing even distribution. In addition, installation of the rectifying ring effectively reduced the circulating flow in an annular channel as well as the total energy loss.

关键词： Oxidation reactorChloride processRectifying ringComputational fluid dynamicsDimensionless pressure

Application of vacuum distillation in refining crude indium

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Rare metals 2013年第6期32卷 627-631页

作者： Wen-Long Jiang Yong Deng Bin Yang Da-Chun Liu Yong-Nian Dai Bao-Qiang Xu The National Engineering laboratory for Vacuum metallurgy Kunming University of Science and Technology state key laboratory Breeding Base of Complex nonferrous metal resources Clear Utilization in Yunnan Province Yunnan Provincial key laboratory of nonferrous Vacuum metallurgy

Vacuum distillation is a technique suitable for low boiling and melting point materials,to remove the heavy and low vapor pressure impurities at low *** indium has low melting point and high boiling point,it is suitable for refining by vacuum ***,saturation vapor pressure for major elements in crude indium was calculated by the Clausius–Clay Prang equation,which could approximately predict the temperature and pressure during vacuum distillation ***,the activity coefficients for In–Cd,In–Zn,In–Pb,In–Tl at 1373 K,and In–Sn at 1573 K were acquired by means of molecular interaction on volume ***–liquid equilibrium composition diagrams of those above systems in crude indium were drawn based on activity *** diagrams could estimate the compositions of products in each process during the refinement of crude ***,1.2–1.6 ton crude indium was used per day when vacuum distillation experiments were carried out,and experimental results are in good agreement with the predicted values of the vapor–liquid equilibrium composition diagrams.

关键词： Vacuum distillation Crude indium Vapor–liquid equilibrium

Damping properties and mechanism of aluminum matrix composites reinforced with glass cenospheres

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Transactions of nonferrous metals Society of China 2024年第9期34卷 2743-2755页

作者： Kai SUN Lin WANG Hang SU Jia-yi GENG Qiang ZHANG Bo MENG Zeng-yan WEI Gao-hui WU School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China state key laboratory for Performance and Structure Safety of Petroleum Tubular Goods and Equipment Materials Xi’an 710000China Shandong Quality Inspection and Testing Center of Construction Engineering Shandong Academy of Building Research Co.Ltd.Jinan 250031China

The damping properties were improved by preparing Al matrix composites reinforced with glass cenospheres through the pressure infiltration *** electron microscopy and scanning electron microscopy were employed to characterize the microstructure of the *** low-frequency damping properties were examined by using a dynamic mechanical thermal analyzer,aiming at exploring the changing trend of damping capacity with strain,temperature,and *** findings demonstrated that the damping value rose as temperature and strain increased,with a maximum value of ***,the damping value decreased when the frequency *** damping under strain and interfacial damping under temperature served as the two primary damping *** increase in the density of dislocation strong pinning points following heat treatment reduced the damping value,which was attributed to the heat treatment enhancement of the interfacial bonding force of the composites.

关键词： glass cenospheres Al matrix composites microstructure low-frequency damping properties

Oxygen pressure acid leaching of artificial sphalerite catalyzed by Fe^3+/Fe^2+self-precipitation

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Journal of Central South University 2020年第6期27卷 1703-1713页

作者： TIAN Lei GONG Ao WU Xuan-gao XU Zhi-feng ZHANG Ting-an LIU Yan WEI Kui-xian YU Zhan-liang School of metallurgical and Chemical Engineering Jiangxi University of Science and TechnologyGanzhou 341000China The state key laboratory of pressure hydrometallurgical technology of associated nonferrous metal resources Kunming 650503China key laboratory for Ecological Utilization of Multimetallic Mineral Ministry of EducationShenyang 110819China

The mechanism of oxygen pressure acid leaching of sphalerite catalyzed by Fe^3+/Fe^2+self-precipitation was investigated in this *** sphalerite was fabricated with varying amounts of iron content via the sintering of ZnS and FeS and used for the pressure acid leaching *** variations in the potential of the pressure leaching system were investigated by using a self-designed potential *** results showed that compared to the non-iron sphalerite,there was a violent redox reaction between the 25.70%Fe-artificial sphalerite and dissolved oxygen during the process of pressure leaching;and the catalytic mechanism was attributed to the redox couple Fe^3+/Fe^2+,where Fe3+oxidizes the H2S gas film and the reduced Fe2+state is subsequently oxidized by the dissolved ***,the effect of temperature,H2SO4 concentration,and oxygen partial pressure on the artificial sphalerite with different iron contents was *** sphalerite samples with iron content were observed to dissolve more easily in sulfuric acid compared to the non-iron ***,the activation energy of artificial sphalerite was observed to be lower in the sample with 25.70%iron content(22.26 kJ/mol)compared to that with no iron(32.31 kJ/mol);and the apparent reaction orders were obtained with respect to H2SO4 concentration(1.10 and 1.36)and oxygen partial pressure(1.29 and 1.41),respectively.A comprehensive kinetic model was developed on the basis of the experimental data and the fitted leaching ratio plot;and the kinetic equations for the leaching of sphalerite catalyzed by Fe^3+/Fe^2+self-precipitation were determined.

关键词： leaching mechanism catalyzed by Fe^3+/Fe^2+self-precipitation potential curves artificial sphalerite leaching kinetics activation energy reaction orders

An easy synthesis of Ni-Co doped hollow C-N tubular nanocomposites as excellent cathodic catalysts of alkaline and neutral zinc-air batteries

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Science China Materials 2019年第9期62卷 1251-1264页

作者： Liang Yu Qingfeng Yi Xiaokun Yang Yao Chen School of Chemistry and Chemical Engineering Hunan University of Science and Technology Xiangtan 411201 China Hunan Provincial key Lab of Advanced Materials for New Energy Storage and Conversion Xiangtan 411201 China The state key laboratory of pressure hydrometallurgical technology of associated nonferrous metal resources Kunming 650503 China

Exploring high-activity electrocatalyst for oxygen reduction reaction (ORR) is of great significance for a variety of renewable energy conversion and storage technologies. Herein, we fabricated novel ORR electrocatalysts derived from Ni-Co nanoparticles encapsulated in hollow tubular C-N composites (ht-CN) through an easy and scalable pyrolysis route utilizing nickel acetate and cobalt acetate as metal precursors, 2-cyanoguanidine as the nitrogen source, and sucrose as the carbon source. Among the prepared nanocomposite catalysts with different molar ratios ofNi/Co, the catalyst Ni2Co3@ht-CN exhibits an outstanding ORR electroactivity comparable to Pt/C catalyst both in alkaline and neutral media. Home-made zinc-air battery with the Ni2Co3@ht-CN as cathode electrocatalyst presents excellent performance and superior durability either in neutral or alkaline medium. The Ni2Co3@ht-CN battery delivers an open circuit voltage of 1.08 V and a maximum power density of 47 mW cm^-2 in 0.5 mol L^-1 KNO3 solution, while 1.51 V and 314 mW cm^-2 in 6 mol L-^1 KOH solution. In addition, whether in neutral or alkaline solution, the constant current discharge curves of the Ni2Co3@ht-CN battery at different current densities exhibit higher voltage plateau and stability than the Pt/C battery. Results demonstrate the potential application of the catalysts of the present investigation to Zn-air batteries both in alkaline and neutral media.

关键词： oxygen reduction reaction Zn-air battery NiCocatalyst carbon nanotube